Method of correcting complexion color shift of LCD and a system thereof

Abstract

The present invention discloses a method of correcting complexion color shift of LCD including obtaining accounting ratio of a complexion region of an image which will be shown in the LCD; comparing the accounting ratio of a complexion region to a predetermined value; and applying a first gamma value to conduct gamma correction of the data of red color, green color, and blue color if the accounting ratio is larger than the predetermined value; wherein the first gamma value is larger than 2.2. The present invention also discloses a system of correcting complexion color shift of LCD. The gamma value of front viewing angle of the LCD is increased. Accordingly, the gamma value of the image of big viewing angle approaches the curve of gamma value 2.2 more in the LCD and wash out of the complexion of the image of big viewing angle is eliminated.

What is claimed is: 
     
       1. A method of correcting complexion color shift of LCD, comprising:
 receiving an image by the LCD; 
 obtaining accounting ratio of a complexion region of the image from the LCD by using an accounting ratio of a complexion region obtaining unit; 
 receiving the accounting ratio of the complexion region from the accounting ratio of a complexion region obtaining unit and comparing the accounting ratio of the complexion region to a predetermined value by a compare unit; 
 applying a first gamma value to conduct gamma correction of the data of red color, green color, and blue color if the accounting ratio of the complexion region is larger than the predetermined value; and 
 receiving the data being gamma corrected and displaying the data being gamma corrected on the LCD; 
 wherein the first gamma value is larger than 2.4, and a range of the predetermined value is 0.1˜0.2. 
 
     
     
       2. The method of  claim 1 , further comprising:
 applying a second gamma value to conduct gamma correction of the data of red color, green color, and blue color if the accounting ratio of the complexion region is not larger than the predetermined value; wherein the second gamma value is less than the first gamma value. 
 
     
     
       3. The method of  claim 2 , wherein the method of obtaining the accounting ratio of the complexion region comprising:
 obtaining amount of pixel of the complexion region; 
 obtaining amount of pixel of the image; and 
 dividing the amount of pixel of the complexion region by the amount of pixel of the image. 
 
     
     
       4. The method of  claim 1 , wherein the method of obtaining the accounting ratio of the complexion region comprising:
 obtaining amount of pixel of the complexion region; 
 obtaining amount of pixel of the image; and 
 dividing the amount of pixel of the complexion region by the amount of pixel of the image.